Honey Stewed Squid - Chapter 31 — Songstress?

Civilization is destroyed and records lost. Only Dudian survives in a cryogenic sleep. Three hundred years later, Dudian wakes up and must become Dean to survive. Who can he trust in this world overrun by monsters without and within?

- Description from Novelupdates

Torn apart and eaten alive by zombies, Jiao Lizhi died filled with regret and hatred. As darkness engulfed her, she opened her eyes—only to find herself back at the beginning of the apocalypse. Crawling back from hell, she sought revenge and fought to live a better life.Watching his loved one torn to pieces before his eyes, he lost his sanity. To avenge her, he destroyed humanity’s last hope with his own hands. On the day the world was swallowed by darkness, he took his own life as the last man standing on Earth. When he opened his eyes again, he vowed never to lose her again!As the world turns into a living hell, will they be able to undo the regrets of their past lives?TRIGGER WARNING!Gore, Violence, Graphic scenes, Abuse.

When I cleared the final chapter of a game that was a national failure, I became an unnamed side character in it.

A non-standard, unmeasurable, EX rank supporting character.

When an S-class elite assassin-raised captain of a special ops suicide squad comes home from a high-stakes Africa mission, he finds himself offered something that could potentially set him up for life- a curious assignment that he could use to finally exit his days of war and slaughter.

Then placed into a high-school setting, Lin Yi is tasked by the chairman of a top-tier multi-billion company with bodyguard duty for non-other than his own daughter, a certain little Miss of said high-school.

His enemies, once ranging from drug lords, mafia bosses, political figures, and national leaders, are soon replaced with spoiled kids who happen to have rich papas and mamas, and Lin Yi finds his intense expertise and high-threat skillset misused, and very underwhelmed…

But he does get a harem cast as diverse as his old enemies, so Lin Yi decides that, for the sake of messing around with girls as an invincible entity in a down-leveled environment, leaving his bloody and death-filled war days behind is something he’d definitely want to strive for.

- Description from Novelupdates